12-05-2012, 11:51 AM
MEMS BASED WHEEL CHAIR
MEMS BASED WHEEL CHAIR.doc (Size: 41.5 KB / Downloads: 71)
ABSTRACT
A MEMS wheelchair is a chair with wheels, designed to be a replacement for walking. The device comes in variations where it is propelled by motors or by the seated occupant turning the rear wheels by hand motions . Often there are handles behind the seat for someone else to do the pushing. Wheelchairs are used by people for whom walking is difficult or impossible due to illness (physiological or physical), injury, or disability. People with both sitting and walking disability often need to use a wheelbench.This device is portable and this system operation is entirely driven MEMS technology. User can wear it to his head like a band and can operate it by tilting the MEMS sensor
The main aim of this project is to control the devices and to ask the basic needs like water, food or medicine by using MEMS (Micro Electro-Mechanical Systems) technology. MEMS is a Micro Electro Mechanical Sensor which is a highly sensitive sensor and capable of detecting the tilt. This sensor finds the tilt is to the right side then the wheel chair turs right if tilted left turs the left side. This device is very helpful for paralysis and physically challenged persons. L293D for switching the motors and Micro controller, which is programmed, with the help of embedded C instructions. The MEMS based sensor detects the tilt and provides the information to the microcontroller. And the controller judges whether the instruction is right movement or left movement instruction and controls the operation respectively.
ADVANTAGES
1. Provids travel aid for disable /old people without assistance of person
2. Autonomously transfer between different locations